c

问题 I am developing a simple shell program, a command line interpreter and I wanted to read input from the file line by line, so I used getline() function. At the first time, the program works correctly, however, when it reaches the end of the file, instead of terminating, it starts to read a file from the start and it runs infinitely. Here are some codes in main function that are related to getline(): int main(int argc,char *argv[]){ int const IN_SIZE = 255; char *input = NULL; size_t len = IN

问题 I am developing a simple shell program, a command line interpreter and I wanted to read input from the file line by line, so I used getline() function. At the first time, the program works correctly, however, when it reaches the end of the file, instead of terminating, it starts to read a file from the start and it runs infinitely. Here are some codes in main function that are related to getline(): int main(int argc,char *argv[]){ int const IN_SIZE = 255; char *input = NULL; size_t len = IN

问题 I am developing a simple shell program, a command line interpreter and I wanted to read input from the file line by line, so I used getline() function. At the first time, the program works correctly, however, when it reaches the end of the file, instead of terminating, it starts to read a file from the start and it runs infinitely. Here are some codes in main function that are related to getline(): int main(int argc,char *argv[]){ int const IN_SIZE = 255; char *input = NULL; size_t len = IN

问题 Question How should I install the TensorFlow C library on MacOS or otherwise address the errors: dyld: Library not loaded: @rpath/libtensorflow.1.dylib Referenced from: /Users/Me/./hello_tf Reason: image not found Abort trap: 6 and dyld: Symbol not found: __cg_DGifCloseFile Referenced from: /System/Library/Frameworks/ImageIO.framework/Versions/A/ImageIO Expected in: /usr/local/lib/libGIF.dylib in /System/Library/Frameworks/ImageIO.framework/Versions/A/ImageIO Abort trap: 6 Context I followed

问题 I created this function that draws a simple polygon with n number of vertexes: void polygon (int n) { double pI = 3.141592653589; double area = min(width / 2, height / 2); int X = 0, Y = area - 1; double offset = Y; int lastx, lasty; double radius = sqrt(X * X + Y * Y); double quadrant = atan2(Y, X); int i; for (i = 1; i <= n; i++) { lastx = X; lasty = Y; quadrant = quadrant + pI * 2.0 / n; X = round((double)radius * cos(quadrant)); Y = round((double)radius * sin(quadrant)); setpen((i * 255)

问题 I'm trying to execute samples provided with "Cryptographic Provider Development Kit"; in this case an example specifically called KeyStorageProviderSample. In this sample, a new Key Storage Provider called "Microsoft Sample Key Storage Provider" is created in the system simply by executing the .exe with the -register param: symmclient -register At this point everything is ok; if I list the KSPs in the system I get the complete list: symmclient -enum The one just created, "Microsoft Sample Key

问题 Given a string consists of words separated by a single white space, print out the words in descending order sorted by the number of times they appear in the string. For example an input string of “ab bc bc” would generate the following output: bc : 2 ab : 1 The problem would be easily resolved if C++ data structures, like a map, is used. But if the problem could only be solved in plain old C, it looks much harder. What kind of data structures and algorithms shall I use here? Please be as

问题 Is there any reasons for 'symbol multiply defined' other than not having the declaration in .h, having it as 'extern', and have the implementation in .cpp? I'm pretty sure that all my files follow the rule, but I'm getting an error message like this: ld: lto: could not merge in /Users/zlw/Library/Developer/Xcode/DerivedData/Wireless - amjmgyrircjezdhegioctszbcypz/Build/Intermediates/Wireless.build/Debug/Wireless.build/Objects normal/x86_64/qam.o because 'Linking globals named '

问题 What is the use of typecasting? Why is it required? Is it just to convert from one type to another? 回答1: The use of type casting can be whatever your program dims necessary. For instance, in The Doryen Library, the types exposed to the user (in header files) are all void* . In the .c files they are cast to whatever is necessary, for instance to mersenne_t in the RNG toolkit. The use is obvious: mersenne_t struct contains fields that should never be messed with or even visible to the library

问题 What is the use of typecasting? Why is it required? Is it just to convert from one type to another? 回答1: The use of type casting can be whatever your program dims necessary. For instance, in The Doryen Library, the types exposed to the user (in header files) are all void* . In the .c files they are cast to whatever is necessary, for instance to mersenne_t in the RNG toolkit. The use is obvious: mersenne_t struct contains fields that should never be messed with or even visible to the library